Information on CVE-2015-5154

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Overview

Information on CVE-2015-5154 was made public on July 27, 2015. The vulnerability is in QEMU, a generic and open source machine emulator and virtualizer that is utilized by Xen, KVM, and other modern hypervisors / virtualization platforms.

Impact

Specifically a flaw with how QEMU’s IDE subsystem handles buffer access while processing certain ATAPI commands, exploitation can allow for the execution of arbitrary code on the host with the privileges of the host’s QEMU process corresponding to the guest.

Summary

  • Made public on July 27, 2015
  • This flaw exploits QEMU, a generic and open source machine emulator.
  • Allows for an attacker to execute arbitrary code outside of their own virtual machine.

Resolution

A patch is available, and Liquid Web’s Heroic Support has proactively scheduled a reboot to patch all affected servers.

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Reminder: Fedora 20 Now End-of-Life (EOL)

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Note:
Please note that this article is considered legacy documentation because Fedora 20 has reached its end-of-life support.

Three versions of the Fedora OS are always kept active, at any given time, by The Fedora Project. These would be: 1. the current release, 2. the release before the current release, and 3. a new release that is in development. Last month saw the launch of Fedora 22 and Fedora 23 is in development, thus the time of Fedora 20 is over.

Fedora 20 has reached end-of-life as of June 23, 2015. This means that no additional security updates will be available from here forward.

Suggested Action

As of today, June 24, 2015, we suggest doing one of the following:

  • Upgrade to Fedora 21.
  • or Upgrade to Fedora 22.

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Information on CVE-2015-3456 QEMU Vulnerability (VENOM)

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Overview

VENOM, or Virtualized Environment Neglected Operations Manipulation, was made public on May 13, 2015. The vulnerability is in QEMU, a generic and open source machine emulator and virtualizer that is utilized by Xen, KVM, and other modern hypervisors / virtualization platforms.

Impact

Specifically a flaw with how QEMU handles out-of-bounds memory access, exploitation can cause the entire hypervisor to crash and may allow an attacker to access other virtual machines outside of their own.

Summary
  • Made public on May 13, 2015
  • This flaw exploits QEMU, a generic and open source machine emulator.
  • Allows for an attacker to access other virtual machines outside of their own.
Resolution

A patch is available, and Liquid Web’s Heroic Support has proactively scheduled a reboot to patch all affected servers.

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How to Prevent Being Hacked by the Cross-site Scripting Vulnerability in WP Super Cache

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The popular WordPress plugin WP Super Cache has been found to have a cross-site scripting (XSS) vulnerability in versions prior to 1.4.4. On sites with outdated versions, it is possible for an attacker to take complete control of the WordPress site. Please note: this vulnerability only affects users which have installed WP Super Cache. However, if you are unsure if you use the plugin or not you should still take precautions to protect your site.

Thankfully, this is vulnerability is simple to address; version 1.4.4, available now, contains a patch.

This tutorial is very similar to our tutorial on updating any WordPress plugin: How To Update a WordPress Plugin

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Information on CVE-2015-0235 (GHOST) Vulnerability for Red Hat and CentOS

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A vulnerability found in the glibc library, specifically a flaw affecting the gethostbyname() and gethostbyname2() function calls, that allows a remote attacker to potentially execute arbitrary code. CentOS 5, CentOS 6, and CentOS 7 are potentially affected, thus we want to highlight the following information.

Liquid Web package repositories have been updated. Many servers (barring those with updates disabled) have received an update that patches this vulnerability, however, a reboot will still be required in those cases.

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Information on CVE-2014-9322 Vulnerability for Red Hat and CentOS

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A vulnerability found in the Linux kernel, specifically a flaw in fault handling associated with the Stack Segment (SS), allows an unprivileged user to potentially gain privileges. CentOS 4, CentOS 5, CentOS 6, and CentOS 7 are potentially affected, thus we want to highlight the following information.
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Information on CVE-2014-6271 and CVE-2014-7169 Bash Vulnerabilities (Shell Shock)

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On September 24th, a vulnerability was reported in the GNU Bourne-Again-Shell (BASh, or Bash), specifically a flaw with how Bash processes values of environment variables, that allows remote code execution of varying types in many common configurations. The overall risk is severe due to bash being configured for use, by default, on most Linux servers.

While Liquid Web immediately began working to proactively patch this vulnerability, some servers may remain vulnerable depending on their update settings or other unforeseen intervening factors. Thus, we’ve provided the instruction below.

To Summarize:

  • This flaw exploits Bash, a Unix command-line shell run by default on most Linux servers.
  • Allows for remote code execution, and many types of command-line based attacks.
  • A patch is available, and your server can be easily updated.
  • We have tutorials on How to Update Bash on Red Hat and CentOS and How to Update Bash on Debian and Ubuntu.
  • Test the vulnerability of your server with the information below.

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Update and Patch OpenSSL on Ubuntu for the CCS Injection Vulnerability

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What is OpenSSL?

OpenSSL is a common cryptographic library which provides encryption, specifically SSL/TLS, for popular applications such as Apache (web), MySQL (database), e-mail, virtual private networks (VPNs), and more.

What is “the CCS Injection Vulnerability”?

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Update and Patch OpenSSL on CentOS for the CCS Injection Vulnerability

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What is OpenSSL?

OpenSSL is a common cryptographic library which provides encryption, specifically SSL/TLS, for popular applications such as Apache (web), MySQL (database), e-mail, virtual private networks (VPNs), and more.

What is “the CCS Injection Vulnerability”?

Continue reading “Update and Patch OpenSSL on CentOS for the CCS Injection Vulnerability”

Information on CVE-2014-0196 Vulnerability for CentOS and Ubuntu

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A vulnerability found in the Linux kernel, specifically a flaw with the pseudo tty (pty) device, allows an unprivileged user to cause a denial of service (system crash) or potentially gain administrator privileges. A small number of CentOS and Ubuntu versions are vulnerable, thus we want to highlight the following information:

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